#!/usr/bin/perl

# SQL-DK

# Copyright © 2013 František Kučera (frantovo.cz)

# 

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# 

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details.

# 

# You should have received a copy of the GNU General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

# Parses Java source code from STDIN and generates script for BASH completion

# Input (in this order):

#	info/globalcode/sql/dk/Constants.java

#	info/globalcode/sql/dk/formatting/*

#	info/globalcode/sql/dk/CLIParser.java

# TODO: support database/formatter names with spaces

use strict;

use warnings;

my $configDir = "~";

while (<>) {

	if (/"(.*?)".*? \/\/\s*bash-completion:dir/) {

		$configDir .= "/$1";

		last;

	}

}

my $databasesFile  = "$configDir/bash-completion/databases";

my $formattersFile = "$configDir/bash-completion/formatters";

my $defaultFormatterFile = "$configDir/bash-completion/default-formatter";

my $formatterPropertiesDir = "$configDir/bash-completion/formatter-properties";

print '#have sql-dk &&

_sql_dk_bash_completion_find_formatter() {

	local previous

	for token in "$@"; do

		if [ "x$previous" == "x--formatter" ]; then

			echo -n "$token";

			return 0;

		fi

		previous="$token";

	done

	if [ -f '.$defaultFormatterFile.' ]; then

		cat '.$defaultFormatterFile.'

	fi

}

_sql_dk_bash_completion_formatter_property_name() {

	if [ -n "$formatter" ]; then # TODO: this does not match formatter name in apostrophes or quotes

		local formatter_dir='.$formatterPropertiesDir.'/$formatter

		if [ -d  $formatter_dir ]; then

			ls -1 $formatter_dir;

		fi

	fi

}

_sql_dk_bash_completion_formatter_property_choice() {

	local property="${COMP_WORDS[COMP_CWORD-1]}";

	local formatter_dir='.$formatterPropertiesDir.'/$formatter

	local property_choices_file=$formatter_dir/$property/choices;

	if [ -f $property_choices_file ]; then

		cat $property_choices_file;

	fi

}

_sql_dk_bash_completion() {

	local cur prev formatter

	COMPREPLY=()

	cur=${COMP_WORDS[COMP_CWORD]}

	prev=${COMP_WORDS[COMP_CWORD-1]}

	case "$prev" in

	--db | --test-connection | --list-jdbc-properties)

		if [ -f '.$databasesFile.' ]; then

			COMPREPLY=( $( compgen -W " $( cat '.$databasesFile.' ) " -- $cur ) )

			return 0

		fi

		;;

	--formatter | --list-formatter-properties)

		if [ -f '.$formattersFile.' ]; then

			COMPREPLY=( $( compgen -W " $( cat '.$formattersFile.' ) " -- $cur ) )

		else

			COMPREPLY=( $( compgen -W "

';

while (<>) {

	if (/"(.*?)".*? \/\/\s*bash-completion:formatter/) {

		print "				$1\n";

	}

	last if (/\/\/\s*bash-completion:options/);

}

print '				" -- $cur ) );

		fi

		return 0

		;;

	--formatter-property)

		formatter=$( _sql_dk_bash_completion_find_formatter "${COMP_WORDS[@]}" );

		COMPREPLY=( $( compgen -W "$(_sql_dk_bash_completion_formatter_property_name )" -- $cur ) ); 

		return 0;

		;;

	esac;

	if [ "x${COMP_WORDS[COMP_CWORD-2]}" == "x--formatter-property" ]; then

		formatter=$( _sql_dk_bash_completion_find_formatter "${COMP_WORDS[@]}" );

		COMPREPLY=( $( compgen -W "$(_sql_dk_bash_completion_formatter_property_choice )" -- $cur ) ); 

		return 0;

	fi

	COMPREPLY=( $( compgen -W "

';

while (<>) {

	if (/"(.*?)".*? \/\/\s*bash-completion:option/) {

		print "			$1\n";

	}

}

print '		" -- $cur ) )

	return 0

}

complete -F _sql_dk_bash_completion sql-dk

';